Eccentric wear prevention centralizing device

Abstract

The utility model discloses an anti-eccentric-wear centralizing device which comprises an oil pushing rod, the surface of the oil pushing rod is sleeved with an anti-eccentric device, the anti-eccentric device comprises a mounting shell and a protective shell, a first spring is arranged between the mounting shell and the protective shell, a groove is formed in the inner side of the protective shell, a guide rod is arranged in the groove, and the guide rod is movably sleeved with a first inclined block and a second inclined block. A third inclined block is in low connection with one side of the first inclined block and one side of the second inclined block; second springs are arranged at the top end of the first inclined block and the bottom end of the second inclined block; in the descending process of the oil pushing rod, the idler wheels roll in the mode of being attached to the well wall, the oil pushing rod can be centralized, the idler wheels are located in the four directions of the oil pushing rod, the service life can be prolonged, the first inclined block and the second inclined block are extruded through the third inclined block, and meanwhile the second inclined block and the first inclined block extrude the second spring; therefore, the rolling stability of the roller and the well wall is ensured, and the roller is prevented from being damaged when the stress is not eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum exploitation, in particular to an anti-eccentric wear straightening device. Background Art

[0002] In the development and production of oil fields, the main thing is to produce oil with a pumping unit. During the normal operation of the pumping unit, due to the well inclination or deflection, and the bending of the pumping rod under the axial load, the pumping rod coupling will be in direct contact with the oil pipe, and mechanical wear will occur during the up and down reciprocating motion of the pumping rod. At the same time, since the oil pipe is filled with fluid from the formation containing rock debris of different properties, these rock debris will cause abrasive wear between the pumping rod coupling and the oil pipe.

[0003] Announcement number CN218716603U discloses a centralizer for oil mining, including a first guard plate and a second guard plate, wherein the first guard plate is fixedly connected to the four sides of the top of the first guard plate. The utility model provides the first guard plate and the second guard plate to protect and support the sucker rod body, and provides the first limit block, the first limit hole, the second limit hole and the second limit block so that the first guard plate and the second guard plate can fit closely, which is convenient for fixing the positions of the first guard plate and the second guard plate, and convenient for installing and removing the first guard plate and the second guard plate. By providing a fixing frame and a first limit groove, the displacement of the movable pull rod can be limited. By providing the movable pull rod, the second limit block can be driven to move by pulling the movable pull rod, which solves the problem that the existing centralizer is troublesome during installation and operation, increases the burden on staff and reduces work efficiency.

[0004] When the sucker rod is straightened, the two sides of the sucker rod can only be straightened by sliding the pulleys at the top of the first guard plate and the bottom of the second guard plate on both sides of the well wall, but the four sides of the sucker rod cannot be straightened, which may easily lead to greater friction between the other two sides of the sucker rod and the well wall, shortening the service life. Therefore, an anti-eccentric wear straightening device is proposed. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides an anti-eccentric wear straightening device, which aims to improve the problem in the comparative documents that the four sides of the sucker rod cannot be straightened, which easily leads to greater friction between the other two sides of the sucker rod and the well wall, shortening the service life.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an anti-wear and straightening device, including an oil push rod, the surface of the oil push rod is covered with an anti-wear device, the anti-wear device includes a mounting shell and a protective shell, a first spring is arranged between the mounting shell and the protective shell, a groove is arranged on the inner side of the protective shell, a guide rod is arranged in the groove, the guide rod is movably sleeved with a first inclined block and a second inclined block, one side of the first inclined block and the second inclined block is low-connected with a third inclined block, and a second spring is arranged at the top end of the first inclined block and the bottom end of the second inclined block.

[0007] As a further description of the above technical solution: slots are provided on both sides of the surface of the protective shell, and a plurality of rollers are provided in the slots.

[0008] As a further description of the above technical solution: a damper is provided in each of the first spring and the second spring.

[0009] As a further description of the above technical solution: connecting blocks are provided on both sides of the mounting shell, bolts are provided between the connecting blocks, nuts are provided on one side of the bolts, and fixing plates are provided on the other side of the bolts.

[0010] As a further description of the above technical solution: the number of the protective shells (201) is two.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. In the process of the oil pushing rod descending, the roller of the utility model is in contact with the well wall and rolls, and the oil pushing rod can be straightened. The rollers are located in four directions of the oil pushing rod, which can extend the service life. The third inclined block squeezes the first inclined block and the second inclined block, and the second inclined block and the first inclined block squeeze the second spring, thereby ensuring the stability of the roller when it is in contact with the well wall and rolling, and avoiding damage to the roller due to unrelieved stress.

[0013] 2. The mounting shells are connected by bolts and nuts, so the anti-deviation device can be quickly mounted and disassembled to improve the flexibility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the anti-deflection structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure of the installation shell and the protective shell of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the A part of the utility model;

[0018] Figure 5 It is a schematic diagram showing the structure of the bolt and nut of the utility model;

[0019] Legend:

[0020] 1. Oil push rod; 2. Anti-bias device; 3. Notch; 4. Roller; 5. Connecting block; 6. Bolt; 7. Nut; 8. Fixing plate; 201. Mounting shell; 202. Protective shell; 203. First spring; 204. Groove; 205. Guide rod; 206. First inclined block; 207. Second inclined block; 208. Third inclined block; 209. Second spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Reference Figure 1-4 The utility model provides an embodiment: an anti-bias wear straightening device, including an oil push rod 1, the surface of the oil push rod 1 is covered with an anti-bias device 2, the anti-bias device 2 includes a mounting shell 201 and a protective shell 202, a first spring 203 is arranged between the mounting shell 201 and the protective shell 202, a groove 204 is arranged on the inner side of the protective shell 202, a guide rod 205 is arranged in the groove 204, the guide rod 205 is movably sleeved with a first inclined block 206 and a second inclined block 207, one side of the first inclined block 206 and the second inclined block 207 is low-connected with a third inclined block 208, and a second spring 209 is arranged at the top end of the first inclined block 206 and the bottom end of the second inclined block 207.

[0023] Reference Figure 1-4 , slots 3 are provided on both sides of the surface of the protective shell 202, and a plurality of rollers 4 are provided in the slots 3.

[0024] Reference Figure 1-4 Dampers are provided in both the first spring 203 and the second spring 209 .

[0025] Reference Figure 1-4 Connecting blocks 5 are provided on both sides of the mounting shell 202 , bolts 6 are provided between the connecting blocks 5 , a nut 7 is provided on one side of the bolt 6 , and a fixing plate 8 is provided on the other side of the bolt 6 .

[0026] The device is mounted on the surface of the oil push rod 1 through the mounting shell 201, and then the connecting block 5 is connected through the bolt 6. One side of the bolt 6 is connected to the fixing plate 8, and the other side is fixed by the nut 7, so as to facilitate the disassembly of the entire device.

[0027] Reference Figure 1-4 , the number of the protective shells 202 is two.

[0028] By having two protective shells 202, it is ensured that the rollers 4 are located in four directions of the oil pushing rod.

[0029] Working principle: The device is mounted on the surface of the oil push rod 1 by means of the mounting shell 201, and then the connecting block 5 is connected by means of the bolt 6, one side of the bolt 6 is connected to the fixing plate 8, and the other side is fixed by means of the nut 7, and thus the mounting shell 202 is installed. During the descending process of the oil push rod 1, the roller 4 rolls in close contact with the well wall, and the oil push rod 1 can be straightened. The roller 4 is located in four directions of the oil push rod, and its service life can be extended. The first bevel block 206 and the second bevel block 207 are squeezed by the third bevel block 208, and at the same time, the second bevel block 207 and the first bevel block 206 squeeze the second spring 209, thereby ensuring the stability of the roller 4 when rolling in close contact with the well wall, and avoiding damage to the roller 4 due to unrelieved stress.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An anti-eccentric wear straightening device, comprising an oil push rod (1), characterized in that: The surface of the oil push rod (1) is sleeved with an anti-deviation device (2), the anti-deviation device (2) comprising a mounting shell (201) and a protective shell (202), a first spring (203) being arranged between the mounting shell (201) and the protective shell (202), a groove (204) being arranged on the inner side of the protective shell (202), a guide rod (205) being arranged in the groove (204), the guide rod (205) being movably sleeved with a first inclined block (206) and a second inclined block (207), a third inclined block (208) being lowered to one side of the first inclined block (206) and the second inclined block (207), and a second spring (209) being arranged at the top end of the first inclined block (206) and the bottom end of the second inclined block (207).

2. The anti-eccentric wear straightening device according to claim 1, characterized in that: Notches (3) are provided on both sides of the surface of the protective shell (202), and a plurality of rollers (4) are provided in the notches (3).

3. The anti-eccentric wear straightening device according to claim 1, characterized in that: Dampers are provided inside the first spring (203) and the second spring (209).

4. The anti-eccentric wear straightening device according to claim 1, characterized in that: Connecting blocks (5) are provided on both sides of the mounting shell (201), bolts (6) are provided between the connecting blocks (5), a nut (7) is provided on one side of the bolt (6), and a fixing plate (8) is provided on the other side of the bolt (6).

5. The anti-eccentric wear straightening device according to claim 1, characterized in that: The number of the protective shells (202) is two.

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